From 859f8b265fc2a11af0fb0c52b4087e0409250592 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 12 Sep 2023 16:02:12 +0000 Subject: ipv6: lockless IPV6_FLOWINFO_SEND implementation np->sndflow reads are racy. Use one bit ftom atomic inet->inet_flags instead, IPV6_FLOWINFO_SEND setsockopt() can be lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller --- net/ipv6/af_inet6.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/ipv6/af_inet6.c') diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index 48737363377f..c6ad0d6e99b5 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -537,7 +537,7 @@ int inet6_getname(struct socket *sock, struct sockaddr *uaddr, } sin->sin6_port = inet->inet_dport; sin->sin6_addr = sk->sk_v6_daddr; - if (np->sndflow) + if (inet6_test_bit(SNDFLOW, sk)) sin->sin6_flowinfo = np->flow_label; BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, CGROUP_INET6_GETPEERNAME); -- cgit